Copy that to /etc/X11/XF86Config or /root/xorg.conf.new depending on the what version FreeBSD you are using.
You may have to change the video card or chipset information.
Section "ServerLayout"
Identifier "XFree86 Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "Files"
RgbPath "/usr/X11R6/lib/X11/rgb"
ModulePath "/usr/X11R6/lib/modules"
FontPath "/usr/X11R6/lib/X11/fonts/misc/"
FontPath "/usr/X11R6/lib/X11/fonts/Speedo/"
FontPath "/usr/X11R6/lib/X11/fonts/Type1/"
FontPath "/usr/X11R6/lib/X11/fonts/75dpi/"
FontPath "/usr/X11R6/lib/X11/fonts/100dpi/"
EndSection
Section "Module"
Load "dbe"
Load "dri"
Load "extmod"
Load "glx"
Load "record"
Load "xtrap"
Load "speedo"
Load "type1"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "keyboard"
EndSection
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/sysmouse"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
EndSection
Section "Device"
### Available Driver options are:-
### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
### [arg]: arg optional
#Option "SWcursor" # [<bool>]
#Option "PciRetry" # [<bool>]
#Option "NoAccel" # [<bool>]
#Option "SetMClk" # <freq>
#Option "MUXThreshold" # <i>
#Option "ShadowFB" # [<bool>]
#Option "Rotate" # [<str>]
#Option "VideoKey" # <i>
#Option "NoMMIO" # [<bool>]
#Option "NoPciBurst" # [<bool>]
#Option "MMIOonly" # [<bool>]
#Option "CyberShadow" # [<bool>]
#Option "CyberStretch" # [<bool>]
#Option "XvHsync" # <i>
#Option "XvVsync" # <i>
#Option "XvBskew" # <i>
#Option "XvRskew" # <i>
#Option "FpDelay" # <i>
#Option "Display1400" # [<bool>]
#Option "Display" # [<str>]
#Option "GammaBrightness" # [<str>]
Identifier "Card0"
Driver "trident"
VendorName "Trident Microsystems"
BoardName "TGUI 9660/938x/968x"
BusID "PCI:0:9:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
SubSection "Display"
Depth 1
EndSubSection
SubSection "Display"
Depth 4
EndSubSection
SubSection "Display"
Depth 8
EndSubSection
SubSection "Display"
Depth 15
EndSubSection
SubSection "Display"
Depth 16
EndSubSection
SubSection "Display"
Depth 24
EndSubSection
EndSection
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